1. Department of Public Health, University Federico II of Naples, 80131 Napoli, Italy
2. Clinical Pathology Laboratory, Provincial Health Authority of Caltanissetta, 93100 Caltanissetta, Italy
3. Degree Course in Medicine and Surgery, Medical Scholl of Hypatia, University of Palermo, 93100 Caltanissetta, Italy
4. Infectious Disease Unit, Provincial Health Authority of Caltanissetta, 93100 Caltanissetta, Italy
5. Department of Pathology and Laboratory Medicine, University of Ottawa, 401 Smyth Road, Ottawa, ON K1H 8L1, Canada
6. Department of Health Promotion, Maternal-Childhood, Internal Medicine of Excellence “G. D’Alessandro”, University of Palermo, 90127 Palermo, Italy
7. Infectious Disease Unit, Department of Health Promotion, Maternal-Childhood, Internal Medicine of Excellence “G. D’Alessandro”, University of Palermo, 90127 Palermo, Italy